178 Descriptions of neiv Ceylon Coleoptera. [no. new series, 
as the typical representative of the family in Ceylon and which is 
here referred to as such) the former by the shortness of the poste- 
rior angles )shich can hardly be said to envelope the shoulders, the 
elytra by being less or not at all narrowed behind, giving an oblong 
rather than an oval shape to the insect. Although in length only 
about one half shorter, it is in bulk certainly one -fourth smaller 
than T. cursiians, and, although probably the smallest Ceylon 
beetle, it is distinguished at first sight. 
19. Ptilium suhquadratum. N. 
P. suhquadratum, subconvexum, pilo'sum, obscure seneotestace- 
um, thorace dilatiore. Long. corp. | lin;; 
Caput mediocre. Antennarum clava art. l^inverte conico, 2^ 
subcylindrico, ultimo elongato-ovato. Thorax convexus, angulis 
basalibus humeros fortissime amplectentibus, apicem versus valde 
rotundatus, apice leviter sinuatus. Elytra quadrata, abdomen non 
totum obtegentia. Scutellum parvura. Pedes robusti tibiis apicem 
versus incrassatis, tarsis art. 3° primi secundique longitudine, his 
subbilobis subtus penicillatis, coxis posticis simplicibus distantibus, 
Mesosternum non carinatum. 
Ubi prcecedentes sed infrequenter occurrit. 
The g. Ptilium is the repository for all the anomalies of the fa- 
mily, its characteristics therefore are very vague, but if the absence 
of the mesosternal carina and the simplicity of the posterior coxae 
are the determining features amongst them, the present species, in 
spite of a variety of anomalies exhibited in other respects, belongs 
to it. The head is of middling size ; the antennae robust with the 
1st joint of the club of the shape of an inverted cone, the 2nd ra- 
ther cylindrical, narrowed at the base and the last elongate, ovate. 
The thorax is of very different structure from that of the foregoing 
species of the family, the basal angles being unusually far produced 
beyond the shoulders, towards the head it is strongly and rapidly 
rounded off, being thus altogether of a semicircular shape, at the 
apex it is merely slightly sinuated, and the head is inserted rather 
below than in this sinuosity, the whole thorax moreover is very 
convex whilst the elytra are depressed. The wings vary from the 
